ABAP Select data from SAP table OIHLIC_GI into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP OIHLIC_GI table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to OIHLIC_GI. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the OIHLIC_GI table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_OIHLIC_GI TYPE STANDARD TABLE OF OIHLIC_GI,
      WA_OIHLIC_GI TYPE OIHLIC_GI,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <OIHLIC_GI> TYPE OIHLIC_GI.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_OIHLIC_GI.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM OIHLIC_GI
  INTO TABLE IT_OIHLIC_GI.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM OIHLIC_GI
*  INTO TABLE @DATA(IT_OIHLIC_GI2).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_OIHLIC_GI INDEX 1 INTO DATA(WA_OIHLIC_GI2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_OIHLIC_GI ASSIGNING <OIHLIC_GI>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<OIHLIC_GI>-OICERTF1_GI = 1.
<OIHLIC_GI>-OIDATFM1_GI = 1.
<OIHLIC_GI>-OIDATTO1_GI = 1.
<OIHLIC_GI>-OIH_LICTP_GI = 1.
<OIHLIC_GI>-OIH_LICIN_GI = 1.

ENDLOOP.

LOOP AT IT_OIHLIC_GI INTO WA_OIHLIC_GI.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_OIHLIC_GI-OIH_LCFOL_GI, sy-vline,
  WA_OIHLIC_GI-OIH_FOLQTY_GI, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_OIHLIC_GI you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_OIHLIC_GI TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_OIHLIC_GI INTO WA_OIHLIC_GI.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.

*Conversion exit ALPHA, internal->external for field OIH_LICIN_GI
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_OIHLIC_GI-OIH_LICIN_GI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIHLIC_GI-OIH_LICIN_GI.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field OIH_LCFOL_GI
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_OIHLIC_GI-OIH_LCFOL_GI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIHLIC_GI-OIH_LCFOL_GI.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_OIHLIC_GI_STR, 
OICERTF1_GI TYPE STRING,
OIDATFM1_GI TYPE STRING,
OIDATTO1_GI TYPE STRING,
OIH_LICTP_GI TYPE STRING,
OIH_LICIN_GI TYPE STRING,
OIH_LCFOL_GI TYPE STRING,
OIH_FOLQTY_GI TYPE STRING,END OF T_EKKO_STR.
DATA: WA_OIHLIC_GI_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_OIHLIC_GI_STR-OICERTF1_GI sy-vline 
WA_OIHLIC_GI_STR-OIDATFM1_GI sy-vline 
WA_OIHLIC_GI_STR-OIDATTO1_GI sy-vline 
WA_OIHLIC_GI_STR-OIH_LICTP_GI sy-vline 
WA_OIHLIC_GI_STR-OIH_LICIN_GI sy-vline 
WA_OIHLIC_GI_STR-OIH_LCFOL_GI sy-vline 
WA_OIHLIC_GI_STR-OIH_FOLQTY_GI sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.